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I bought a couple of Tillerton HR's off Ebay which had been setup to run some type of stationary engine now their fitted to my Mac's after replacing the main butterfly's with new ones as the origional ones had a air bleed hole drilled in them.

Now i need to know what the origional jet sizes were as the saws run very well at high speed but load up badly at low speed with no real control offered by the low speed mixture screw.

Thanks fellas

Mc Bob.

McBob,
Have you checked the pop-off pressure on them,
and the falcrum height ?
Many times a little more pop-off pressure, or lower falcrum height will correct an issue like that.

No Gordon i haven't but i will now .................

Mc Bob.